Effects of selected physical and chemical treatments of Colorado potato beetle eggs on host acceptance and development of the parasitic wasp, Edovum puttleri

1999 ◽  
Vol 90 (3) ◽  
pp. 237-245 ◽  
Author(s):  
Jing S. Hu ◽  
Dale B. Gelman ◽  
Robert A. Bell
Keyword(s):  
Colorado Potato Beetle ◽  
Parasitic Wasp ◽  
Host Acceptance ◽  
Edovum Puttleri ◽  
Chemical Treatments ◽  
Potato Beetle ◽  
Physical And Chemical

Alightment of Edovum puttleri Grissell (Hymenoptera: Eulophidae) in Response to Colors Mimicking Three Hosts of the Colorado Potato Beetle (Coleoptera: Chrysomelidae)

1997 ◽  
Vol 32 (4) ◽  
pp. 386-397 ◽  
Author(s):  
Barbra Vasquez ◽  
James H. Lashomb ◽  
George Hamilton
Keyword(s):  
Colorado Potato Beetle ◽  
Paired Comparisons ◽  
Leaf Color ◽  
Edovum Puttleri ◽  
Potato Beetle ◽  
Board Test

The effect of leaf color on alighting behavior of Edovum puttleri Grissell was examined in a laboratory sticky-board test. Paint models mimicking the leaf top colors of eggplant, potato, and tomato and a model mimicking average underside leaf color were tested in paired comparisons. The underside leaf color mimic was the most preferred; no significant differences in landing rates occurred among any of the three leaf top color mimics. The underside leaf color mimic also was tested against two gray shades sharing the same intensity of reflectance; no significant differences were detected. The parasitoid, therefore, preferentially alighted based on the intensity and not the hue of the models. For all assays, a significant departure from randomness was found because a higher percentage of females alighted on the paint models than that which was in the colony. This suggests that parasitoids were alighting in a search for host eggs.

INTERACTIONS AT THREE TROPHIC LEVELS: EDOVUM PUTTLERI GRISSELL (HYMENOPTERA: EULOPHIDAE), THE COLORADO POTATO BEETLE, AND INSECT-RESISTANT POTATOES

1989 ◽  
Vol 121 (10) ◽  
pp. 841-851 ◽  
Author(s):  
John R. Ruberson ◽  
Maurice J. Tauber ◽  
Catherine A. Tauber ◽  
Ward M. Tingey
Keyword(s):  
Colorado Potato Beetle ◽  
Leptinotarsa Decemlineata ◽  
Life History Traits ◽  
Glandular Trichomes ◽  
Trophic Levels ◽  
The Other ◽  
Edovum Puttleri ◽  
Potato Plants ◽  
Potato Beetle ◽  
Insect Resistant

AbstractResistant potato plants influenced the parasitoid Edovum puttleri Grissell directly, as well as indirectly through eggs of the parasitoid’s host, the Colorado potato beetle, Leptinotarsa decemlineata (Say). In the field, E. puttleri parasitized more egg masses on plants with no glandular trichomes or with glandular trichomes bearing only enclosed droplets of exudate than on plants with two types of glandular trichomes (one with exposed droplets and the other bearing enclosed droplets). Trichomes with exposed droplets entrapped numerous parasitoids. Although rearing L. decemlineata on resistant plants influenced many of the beetle’s life-history traits, it did not affect the suitability of their eggs for development and survival of preimaginal E. puttleri. However, eggs from L. decemlineata that were reared on resistant potato plants reduced the longevity of the parasitoids and also reduced the number of hosts (eggs) killed by parasitoids.

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